diff --git a/Gemfile.lock b/Gemfile.lock
index 47e56ea..4fec6ff 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,8 +69,9 @@ GEM
     mutex_m (0.2.0)
     netrc (0.11.0)
     parallel (1.22.1)
-    parser (3.1.2.0)
+    parser (3.3.6.0)
       ast (~> 2.4.1)
+      racc
     pleaserun (0.0.32)
       cabin (> 0)
       clamp
@@ -82,6 +83,7 @@ GEM
       coderay (~> 1.1)
       method_source (~> 1.0)
     public_suffix (5.0.4)
+    racc (1.8.1)
     rack (2.2.4)
     rainbow (3.1.1)
     rchardet (1.8.0)